Disk cultivator.



No. 897,213. PATENTED AUG. 25, 1908. I. J. LEWIS.

DISK GULTIVATOR.

APPLICATION FILED MAR.28, 1908.

2 SHEETSSHEET 1 W/TNESSES INVENTOH FRANK rlLEwls A TTOH/VE Y8 No.897,213. PATENTED AUG. 25, 1908.

F. J. LEWIS.

DISK GULTIVATOR.

APPLICATION FILED MAR.28, 1908.

2 SHEETS-SHEET 2.

J42 JJ 1% 1% 3 a :Z rm J 1 a? ,IIHIHHHIIIM? 5 i I; 1. 0 iwim," I 5' if 7Jfl 160/ WI. 58858 INVENTOH V/ 4 FRANK IT LEWIS 4 By UNITED STATESPATENT onrion.

FRANK J. LEWIS, OF GUADALOUPE, CALIFORNIA.

DISK CULTIVATOR.

- specification.

In disk liarrows and cultivators there is necessarily more or less sidedraft which must be resisted or compensated for. I

have devised an improved cultivator of this type in which two series offiat disks are arranged in front of the concave disks and serve toresist the side draft of the latter while acting also as circularcolte'rs by which the soil is sliced vertically in parallel rows.

The concave or soil-cutting disks are arranged, like thecolters thatprecede them, in two series, and on separate horizontal axles, orshafts, which are pivoted and adapted to swing horizontally in orderthat the disks may be set at different inclinations to the line oftravel of the cultivator as a whole, and thus caused to take or dislodgemore or less soil.

The invention is embodied in the construction, arrangement, andcombination of parts hereinafter described, and shown in theaccompanying drawings in which Figure 1 is an inverted plan view of thecultivator. Fig. 2 is a vertical section on the line 2-2 of Fig. 1. Fig.3 is a vertical section on the line 3-3 of Fig. 1,.the frame of thecultivator being shown broken out in the middle ortion in order toillustrate the position and relation of a lever; Fig. 4 is a verticallongitudinal section of therear portion of the'cultivator.

The frame A of the cultivator ispreferably constructed of a front bar 1,a rear bar 2, and a series of connecting longitudinal bars 3, 3. Thebarsl and 2 are inclined with relation to the connecting bars 3, 3*.There are two sets of concave cutting disks B, B, and two correspondingsets 0, C, of plane or flat colter disks. The concave cutting disks Bare mounted rotatably upon an axle 4, and the disks B are similarlymounted on an axle 5.

The'axles 4, 5, are pivoted at 6 in supports 7 consisting of metal barsor rods which extend u through the rear corners of the frame and aresecured by nuts, as shown in Fig. 2.. The construction whereby these suports or posts 7 are connected with the ax es B, B, may be varied, but,as shown Specification of Letters Patent. Application filed March 28,1908. Serial No. 423,839.

in'Fig. 2, a collar 9 is clamped on the axle and provided with trunnionswhich are in vertical alinement and the lower end of the supports orposts 7 is semicircular and provided with sockets adapted to receive thesaid trunnions. I thus form a detachable connection between the disksand the posts and at the same time a secure one which permits the axlesto oscillate in a horizontal plane. The position or angle at which theaxles 4, 5, may be set relative to the frame and to each other, andtherefore the angle of the cutting disks B, B, to the line of travel ofthe cultivator, may bevaried at will, and for this purpose I employlevers 10, 1 0, and links 11, 11 see Figs. 3 and 4. are jointed with theinner ends of the axles 4 and 5 and with the lower ends of the levers10, 10, which are pivoted on the frame and provided with means forlocking them to toothed segments 12, as will be readily unstood from thedrawing. When the cutting disks B, B, are set in the working position,the axles 4 and 5 are in alinemcnt as shown in Fig. 1; but it isapparent that they may be set at' different angles to each other and tothe line of travel of the cultivator.

The plane, or fiat, colter disks C, C, are

mounted on axles 13, 13, which are pivoted at 14 in vertical posts or suports 7* similarly to the posts 7 before cescribed. The pivotal points14 are at the front corners of the frame A, in the same manner as thepivotal points of the rear axles 4 and 5, are at the rear corners of theframe. The pole or tongue 15 to which horses or other draft animals arein practice attached, is pivoted at 16 t0 the front bar 2 of the frameA, and is suitably supported by a half circle 17, or by other meanswhich may be preferred. The tongue is connected by rods 18, 18, with theouter ends of the front axles 13, 13. The connection may be effected inVarious ways, it being only necessary that the axles shall be free torevolve and that the rods 18, 18, shall not come in contact with thedisks 0,1). The form of joint or connection is indicated in Fig. 3, therear ends of the rods 18, 18, being forked or semicircular, and attachedto a trunnioned collar clamped on either axle.

-It is apparent that if the team be driven straight ahead,.the colterdisks C, C, will be held and travel in planes )arallel to suchdirection; but if the team 0 driven right or left, the tongue 15 willassume a greater or The links less angle to the frame, and therebytheangle of the colter disks to the frame will be chan edcorrespondingly. The disks 0, C, are tins ada ted not. 0111' to supportthe front end of t e frame, an to cut the soil or sward in advance ofthe cutting disks or'cultivating implements roper B, B but the most imortant'function of the colter disks 0, C, is, owever, to prevent, orcompensate for, the sidedra'lt due to the action of the concave disks B,B. It is obvious that this side draft will increase with theinclination" of the cutting disks, or in other Words it will he greaterwhen a Wide slice of soil is taken. by the concave disks than When anarrow one is taken.

What I claim is: t I

A disk cultivator comprising a frame, axles pivoted, beneath the frameand adapted to seams placed at diflerent inclinations to-theline oftravel of the cultivator, concave cutting disks mounted on saidaxles,.-means for adjusting the angle of the axles, and two for Wardaxles also pivoted and adapted to swing horizontally, and plane or flatdisks swing horizontally so that they may be "20 mounted on said afiesand adapted to serve as colters, a tongue pivoted to the front oftheframe, and means connecting the same with the colter' axles forshi'ftingthe inclination L of the latter corresponding with the angle of

